JPH04337873A - Picture display device - Google Patents

Abstract

PURPOSE:To display a total image and the partial enlarged image of the whole image, which are to be display on the same screen, to freely and minutely investigate a content and to easily enlarge/display a target part. CONSTITUTION:Picture information read by an image input part 11 is temporarily stored in an input buffer 12 and it is recorded in the recording medium of a disk device 15. CPU 13 reads and writes data from and into a memory 14. An enlargment/reduction display processing part 18 and a gray scale generation processing part 19 execute an picture information processing corresponding to the instruction of a pointing device 17 and it is transmitted to an picture memory part 20 so as to constitute the display screen.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device capable of displaying an enlarged image of the currently displayed image on the same screen.

0002

[Prior Art] Generally, in order to display a large amount of information in a limited display area, a display device has a display device that moves the content displayed in the display area vertically or horizontally. A so-called scrolling function that adds new display content is often used. This allows you to view the entire information as a whole of the individual details while displaying the details of each part. Even when the scroll function is used in this way, all information is not displayed at a glance, and it is difficult to intuitively grasp where the current display position is located in the overall information image.

[0003] For this reason, there is a method of displaying current position information using a scroll bar as shown in FIG. 5, in which the current coordinate position corresponding to the XY coordinates is displayed. In FIG. 5, the display area 42
When the actual dimensions of are width w and height h, respectively, the overall size of the original image to be displayed is width (w ×
th/ch), and the height is expressed as (h×tw/cw). a scroll bar 40 in the width and height directions, respectively;
The center of 41 indicates that it is located at the center (x, y) of the currently displayed screen. The scroll bars 40 and 41 are moved and scrolled by selecting and instructing the scroll bar related to the desired movement direction with the cursor 34.

0004

[Problem to be Solved by the Invention] However, the scroll bars 40 and 4 that are displayed with the width and height of the above display area.
When trying to display the current position in step 1, it is difficult to intuitively understand the scroll bars arranged on the sides of the display area and the coordinates (x, y) of the center position by the scroll bars. It is also difficult to find the desired location. In addition, since the operation of moving the scroll bar is performed by a combination of up and down or left and right, there are problems such as poor usability in terms of operation. In addition, depending on the switch,
There are some models that select and display various modes to fit the entire image or to show detailed information, but each time you switch to a mode that displays detailed information, you need to remember information such as the target position, and you still have to remember the target position. It is difficult to grasp the information, and it is difficult to look for it while scrolling.

In view of the above-mentioned circumstances, the present invention has been developed to display an entire image and an enlarged image on the same screen, regardless of whether the screen is small and a display device with a low resolution or a display device with a high resolution is used. The purpose is to provide an image display device that allows users to freely examine the content.

[0006]

[Means for Solving the Problems] An image display device according to the present invention provides at least two display areas on the screen of an image display means for displaying an image including character information, and the image should be displayed in one display area. Display the entire image so that it fits,
In the other display area, an enlarged image of a part of the above-mentioned whole image is displayed, and on the above-mentioned whole image, a movable area specifying cursor and a display frame indicating the area to be enlarged are displayed, and a display frame is displayed in the above-mentioned display frame. Enlarge the content of the enclosed area in the other display area, or display the enlarged image overlapping the display area that displays the entire image, and move the cursor. The above-mentioned problem is solved by moving one of the display areas as the display area moves.

[0007]

[Operation] The image display device according to the present invention displays an entire image and an enlarged image on the same screen.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an image display device according to the present invention will be described with reference to the block diagram shown in FIG. 1 and FIG. 2 showing each display area. In FIG. 1, an image input unit 11 such as a so-called image reader or image scanner reads an image original such as a document, photograph, or picture, converts it into an electrical image signal, and converts it into digital image information. ) 12 to temporarily store the digital image information. The image information temporarily stored in this input buffer 12 is read out by a central processing unit (hereinafter abbreviated as CPU) 13. CPU 13 is memory section 1
performs image processing while transmitting and receiving the image information to and from 4;
The processed image information is sent to the disk device 15 and recorded on, for example, a magneto-optical disk.

To explain a specific example, the image input section 11
reads the above-mentioned image original at a high resolution of, for example, 12 to 16 lines/mm, converting it into black and white, and storing the binary image data in the input buffer 12 as it is. Although the stored data may be recorded as is on a recording medium such as the magneto-optical disk, the data is usually compressed and recorded. This data compression process is executed while the CPU 13 reads and writes data to and from the memory unit 14. Furthermore, an identification code consisting of, for example, a series of numbers is assigned to one piece of image information, and this identification code and the compressed image information are recorded on a recording medium such as a disk by an editing function or the like. Ru.

Next, regarding the binary image information recorded on the recording medium, one screen information (data corresponding to a page) instructed to be displayed by the keyboard 16 via the disk device 15 is processed under the control of the CPU 13. The data is read out to the memory section 14. Note that the above-mentioned one-screen information does not simply display information for a predetermined unit of one item, but also allows information regarding a plurality of items to be displayed on one screen. This display of a plurality of items does not require resolution until the contents are read and confirmed, and can be displayed at a resolution that allows rough visual information received from image information indicating each item to be recognized. The memory section 14 sends the digital data supplied to the gray scale creation processing section 19.

[0011] The gray scale creation processing unit 19 converts the supplied binary image information into an entire page display area 3 to be described later.
In other words, the binary image information supplied to the memory unit 14 is converted into multi-valued image information data having gradation so that it can show a resolution suitable for screen display of 2. The conversion method will be detailed in the description of FIG. This converted data is supplied to the entire page display buffer 22 within the image memory 20. This entire page display buffer 22
The data is read out and displayed in the entire page display area 32 of the display screen 30 shown in FIG. The display in the entire page display area 32 is performed with a slightly lower resolution (for example, about 2 lines/mm), but is displayed in gray scale to improve the image quality.

Furthermore, the image display apparatus can instruct the position of the display area to be moved vertically and horizontally by operating a pointing device 17 as one of the input control devices. The pointing device 17 includes a so-called mouse. In the above-mentioned mouse, one button is used to specify the area of the frame 33 indicating the area to be enlarged, and the other button is used to display the enlarged image in a dynamic operation in the direction of reducing the enlargement ratio to 1. A reduced display instruction button is assigned to reduce and display the image.

The position of the pointing device 17 shown in FIG. 2 by this mouse operation is indicated by an arrow 34 icon. Further, the memory section 14 supplies the enlargement/reduction display processing section 18 with data in a range surrounded by a frame 33 indicating the enlargement target area shown in FIG. The enlarged/reduced display processing section 18 receives image information supplied in response to an instruction from the pointing device 17 indicating whether to display an enlarged image or to display an enlarged image in a reduced size in the direction of lowering the enlargement ratio to 1. is converted so that it can show a resolution suitable for screen display in an enlarged display area 31, which will be described later.

In this enlarged display area 31, enlarged display is performed as if zoomed in from a display with the same enlargement ratio equal to the size shown in the entire page display area 32. This converted data is supplied to an enlarged display buffer 21 within the image memory 20. The data in the enlarged display buffer 21 is read out and displayed on the enlarged display area 31 of the display screen 30 shown in FIG.

One embodiment of the screen configuration of the image display device will be briefly described with reference to FIG. The screen 30 includes an enlarged display area 31 that displays an enlarged image, an entire page display area 32 that displays an entire image, and other display areas 36. On the screen of the entire page display area 32, a frame 33 indicating an area to be enlarged and an icon arrow 34 are displayed in an overlapping manner. The frame 33 indicating the area to be enlarged is displayed centered on the position indicated by the arrow 34 of the icon.

Furthermore, a frame 35 within the enlarged display area 31 has the same aspect ratio as the frame 33 described above, and indicates the area of the frame 33 in this enlarged display area 31. The frame 33 is
Enlarging/reducing display instructions are not performed only by the pointing device 17, but can also be controlled by buttons on the keyboard 16 shown in FIG. 1, or the like. This frame 33 can change the data in the enclosed range according to the enlargement/reduction instructions while maintaining the aspect ratio. In accordance with this variable enlargement/reduction, the enlarged display area 31 displays enlarged images while maintaining the aspect ratio. By operating in this manner, even if a high-resolution display is used, it is tiring to read small details, so the magnifying glass can be used at intervals larger than the original size of the display.

Next, the operating principle for performing this enlarged display will be explained with reference to FIG. 3 and, if necessary, FIG. 1. In this explanation, the entire page display area 32 is
Assume X-Y coordinates with this upper left end position as the origin (0,0). At this time, the entire page display area 32 has a width of p
w and height are expressed as ph. The position indicated by the arrow 34 has coordinates expressed as (posx, posy), and the width of the frame 33 centered on this point is posx2 and the height is poshx2. In addition, the enlarged display area 31 has a width of subw×
2. When the height is subh×2 and the original high-resolution image information read by the image input unit 11 is displayed, the width is ow and the height is oh.

To explain using the symbols defined above, the aspect ratio (ow/oh) of the original high-resolution image information and the aspect ratio (pw/ph) of the entire page display area 32 are equal, and the aspect ratio of the frame 33 is equal. Each frame is set so that the aspect ratio (posw/posh) and the aspect ratio (subw/subh) of the enlarged display area 31 are also equal. The data in the memory unit 14 shown in FIG. 1 is expressed by multiplying the width and height by the ratio of the size of the original resolution image information to the size of the entire page display area 32. In other words, the coordinates corresponding to the origin are ((posx-posw)×
ow/pw, (posy-posh)×oh/ph). Further, the width and height of the frame 33 are respectively (p
osw×2×ow/pw), (posh×2×oh/p
h). Upon receiving the coordinate data, width and height data, the enlargement/reduction processing unit 18 determines that the range of the width and height of the frame 33 is within the width (sub) of the enlarged display area 31.
w×2), and the height is processed to become (subh×2), generated in the enlarged display buffer 21, and displayed in the enlarged display area 31.

For example, when a button for instructing enlargement is pressed on the pointing device 17, the width of the frame 33 (
posw) and height (posh) as constant a (however, a
> a constant of 1). Conversely, when the button instructing reduction is pressed, the display target area of the frame 33 becomes wider by multiplying the width (posw) and height (posh) of the frame by a constant a, so that the display area of the enlarged display area 31 becomes wider. The area is shrinking. In addition, the grayscale creation processing unit 1
9 converts the data into data with a resolution corresponding to the above enlargement/reduction.

For example, 400dpi (approximately 16 lines/mm)
If data with a resolution of is white, and if there are 64, it is black. This data with a number between 0 and 64 is converted so as to be expressed in shading (gray). here,
dpi indicates the number of dots displayed per inch. The data that has undergone this conversion is supplied to the entire page display buffer 22 and displayed in the entire page display area 32.

[0021] With the above configuration, the entire image and the enlarged/reduced image can be displayed on the same screen, making it possible to display the entire image and the enlarged/reduced image on the same screen. In either case, the entire image and enlarged image can be displayed on the same screen, allowing you to freely examine and view the contents.

Another embodiment of the present invention will be briefly described with reference to FIG. This embodiment has the same configuration as the blocks shown in FIG. 1, but the image display area has a configuration different from the screen configuration shown in FIG. 3. This screen configuration is
The display area that displays the enlarged image is displayed in a superimposed manner within the display area that displays the entire image of the image, and as the cursor moves, one of the display areas moves to change the area to be displayed. It is the composition. That is, the entire page display area 32 that displays the entire image and the enlarged display area 31 that displays the enlarged image are displayed in a superimposed manner. At this time, the frame 33 and the cursor 34 of the enlargement target display area can be switched to be displayed on the screen or not displayed using a switch.

When displaying these images in an overlapping manner, as shown in FIG. 4, the frame 33 of the enlarged display area is
When displaying a smaller area, the image information displayed in the enlarged display area 31 is displayed with an enlargement ratio greater than 1. In particular, when the range to be enlarged and the enlarged display area completely overlap (the enlargement ratio is 1), the ratio (subw/posw) between the width of the frame 33 and the enlarged display area 31 becomes 1. Therefore, the user can choose between the enlarged display area 31 and the entire page display area 32 at the upper left of the screen shown in FIG.
The frame 33 can be simply viewed naturally as if it were present in the entire page display area 32, without having to be conscious of comparing the frame 33 with each other.

[0024]Here, when a button instructing enlarged display is pressed using the pointing device 17, the image displayed in the area of the frame 33 is enlarged. This enlarged display is displayed conspicuously as if one were to lift up a Fresnel lens placed on a piece of paper, and can be freely enlarged and viewed in accordance with the control of the display instruction button of the pointing device 17. As a result, as in the above-described embodiment, even if a high-resolution display is used, it is tiring to read fine details, so it is possible to use a magnifying glass interval larger than the original size of the display.

In this embodiment as well, the reduced display of the pointing device 17 is controlled so that the ratio of the width of the frame 33 to the enlarged display area 31 is not less than 1. Further, the display area of the enlarged display area 31 can also be changed.

[0026]

Effects of the Invention As is clear from the above description, according to the image display device of the present invention, an entire image and an enlarged image can be displayed on the same screen through enlargement/reduction processing, grayscale creation processing, etc. This allows you to freely examine the content by displaying the entire image and enlarged image on the same screen, even when using a display device with a small screen and low resolution or a display device with high resolution. You can see the parts in detail. Furthermore, even if a high-resolution display is used, fine details can be displayed on the screen at an appropriate size as described above, making it easier to read.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of an image display device according to the present invention.

FIG. 2 is a schematic diagram showing a screen configuration of an image display device.

FIG. 3 is a schematic diagram illustrating the operating principle when displaying an entire image and an enlarged image on the same screen in the screen configuration of the image display device.

FIG. 4 is a schematic diagram showing a screen configuration in another embodiment of the present invention.

FIG. 5 is a schematic diagram illustrating the operation of a conventional scroll bar.

[Explanation of symbols] 11... Image input section 12...
......Input buffer 13...
...CPU 14...Memory section 15...
・・・・・・Disk device 17・・・・・・・・・
・・Pointing device 18・・・・・・・・・・
・・Enlargement/reduction display processing unit 19 ・・・・・・・・・・・
・Grayscale creation processing section

Claims (2)

[Claims] Claim 1: At least two display areas are provided on the screen of an image display means for displaying an image including text information,
The entire image to be displayed is displayed in one display area, and an enlarged part of the entire image is displayed in the other display area. 1. An image display device, wherein a cursor and a display frame indicating an area to be enlarged are displayed, and the contents of the range surrounded by the display frame are enlarged/reduced in another display area. 2. A display area for displaying the enlarged image is displayed in a superimposed manner within a display area for displaying the entire image of the image, and one of the display areas moves as the cursor moves. Characteristic image display device.